Since VMware Tools version 12.0.5, PVSCSI driver package running on Windows 11 and Windows Server 2022 is different than the one that runs on Windows 8/10 and Windows Server 2012/2016/2019, so if users upgrade VMware Tools to 12.0.5 or later before guest OS upgrade, the PVSCSI driver installed in the guest is not compatible with the guest OS after upgrade. For Windows Server 2016 or Windows Server 2019, when there is no network connection during guest OS upgrading process, Windows setup cannot get the updates to roll back to use the inbox PVSCSI driver after guest OS upgrading to Windows Server 2022. For Windows 11 v21H2, there is no inbox PVSCSI driver.